This may be considered OT, if so delete. If not here is the question. Can a Dart SBC head be drilled for exhaust crossover? Any help from someone who has experience much appreciated. Thanks.
Can you see a cross over in the exhaust port going toward the middle of the head even if the port on the intake side isn't opened?
What is the intake? I use Dart heads myself, but always with their intake, wards off lots of evils. Talk to Dart, I do not recommend mixing other vendor intakes with their heads.
If you need an exhaust crossover than you probably didn't need Dart heads. if you are looking for warming of the intake, look into a water heated carb spacer.
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